Mounting and drive for a hydraulic pump on an engine

ABSTRACT

A mounting and drive for a hydraulic pump on an engine having a crankshaft and a flywheel gear. Additional gear means are in driving relation with the flywheel gear and extend from the crankshaft to the pump for powering the pump directly from the engine. A mounting plate is secured to the engine, and a bearing support and a pump bearing are on the mounting plate. A pump gear is supported in the bearing, and the pump shaft connects with the pump gear and is removable therefrom for removal or replacement of the pump. Also, the flywheel and the gears extending to the pump are removable for altering the gear ratio.

United States Patent 11 1 Engstrom Dec. 25, 1973 MOUNTING AND DRIVE FOR A HYDRAULIC PUMP ON AN ENGINE Primary ExaminerCarlton R. Croyle Assistant Examiner-Richard E. Gluck [75] Inventor: W1lham A. Engstrom, Racine, Wis. Atmmey Anhur J Hansmann [73] Assignee: J. I; Case Company, Racine, Wis. 22 Filed: Dec. 11, 1972 L d dd s??? mounting an ve or a y rau 1c pump on an en- [211 Appl' 313,783 gine having a crankshaft and a flywheel gear. Additional gear means are in driving relation with the 52 us. (:1 417 360, 417/364, 74/l5.63, flywheel g and extend from the erehkehhft to the v v 123 193 C pump for powering the pump directly from the engine. 51 1m. (:1. .1 F04b 17 00, F1611 37/00 I A mounting plate is Secured to the engine, and a bear- 58 Field 61 Search 4171353 9, 2 3 ihg supper! and a p p hearing r on the mounting 417/364, 237, 324, 380; 74/15.63; 123/198 0 Plate A p p g is supported m the g. and

the pump shaft connects with the pump gear and is re- 5 R f r n ig movable therefrom for removal or replacement of the UNITED STATES PATENTS pump. Also, the flywheel and the gears'extending to 1,719,373 7 1929 Hull 417 364 the Pump are removable for altermg the gear 2,512,125 6/1950 Whited 417/364 X Claims, 3 Drawing Figures w /4 I I u i1 11 l 1 5 24 23 1 0 1 3' i 3 7 1 I' l 38 I '36 W 33 32 r 1 x 1 i 34 K I I F ,1\\\\\ 1% ll. 1 I Z/ 2 g I V I 4/ I K 22 v A l l/ 29 PATEHTEB H25 1973 saw 1 of 2 MOUNTING AND DRIVE FOR A HYDRAULIC PUMP ON AN ENGINE This invention relates to a mounting and drive for a hydraulic pump on an engine.

BACKGROUND OF THE INVENTION This invention involves a new and simplified manner for driving an accessory, particularly a hydraulic pump, in conjunction with an engine. For instance, in a utility lift truck, or the like, an engine is employed to power the vehicle, and it is frequently desirable to have accessory or supplementary power means, such as material handling mechanism which is powered by a hydraulic pump or the like. In these instances, the lift truck or like mechanism is commonly arranged so that only a minimum of space is occupied by the truck, and the truck is therefore most useful in its function. Accordingly, in achieving the compact design mentioned, space is at a premium and accessory equipment is difficult to properly locate in order to retain the compact design mentioned.

The present invention recognizes this problem and solves the problem by arranging a power plant of an engine and an accessory drive in a compact construction, and in one which is efficient, easily manufactured and serviced, and one which is even versatile in that it can be removed and replaced..Still further, the structure of the present design provides for an interchange of parts so that the speed of driving the pump, for instance, can be altered by a ready and interchange of gears which are provided in this accessory drive construction. Still further, the present invention allows for the continued utilization of a standard type engine, and only certain adaptations are made to the standard engine in order to provide for the attachment of the accessory drive, such as the hydraulic pump.

Accordingly, the present invention provides a structure of a mounting and drive for a hydraulic pump, or the like, on a conventional engine, and wherein the pump can be readily and easily installed or removed according to the particular desire, and, the speed of driving the pump can be readily and easily altered, even through a gear train which is directly driven from the engine crank shaft. Still further, and in accomplishing these objectives, the full engine power utilized, and the ratio of pump speed to engine speed can be selected according to desires. Also, the force of the drive to the pump is not counterbalanced by the pump itself, but instead the driving force is counterbalanced by support mechanism arranged in the attachment itself and thus the pump hearing or the like need not take the brunt of the driving force.

Still further, the mounting and drive of this invention is arranged so that the pump can be removed and replaced by a pump of a different type or of a different size, and only a minimum of time and effort are required in the removal or replacement process. Also, by virtue of the small radial load of the driving force, as mentioned above, the cost of the pump and the size of the pump bearing can be less than otherwise required.

Other objects and advantages will become apparent upon reading the following description in light of the accompanying drawings:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear elevational view of a preferred embodiment of this invention.

FIG. 2 is a top plan view of the embodiment shown in FIG. I, with parts shown in section.

FIG. 3 is a side elevational view of the embodiment shown in FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The drawings show an engine fragment designated 10, and having a flywheel I1 and a flywheel gear 12 suitably secured to the engine crankshaft 13. Thus, it will be understood that the crankshaft 13 is rotated under the power of the engine 10, and the flywheel I1 is also rotatable along with the shaft 13. An engine starter 14 is mounted on the engine and has a starter gear 16 which is engaged with the flywheel gear 12, as seen in FIG. l.

The present invention improves upon the structure in that it makes provision for including a powered unit, such as a hydraulic pump 17 which is suitably mounted to the engine, such as by means of screws 18. It will be further understood that where a hydraulic pump 17 is employed, suitable fluid lines would extend from the pump and off to mechanisms which are powered by fluid under pressure, as created by the pump 17 which is directly driven from the engine 10.

The drive between the engine 10 and the pump 17 is through gear means, and it will therefore be seen that the flywheel 11 has screws 19 passing therethrough and extending into the enlarged .end of the engine crankshaft 13, for attaching the flywheel 11 to the engine crankshaft 13, as mentioned. Also, a gear 21 is shown interposed between the flywheel 11 and the engine crankshaft l3 for being connected therebetween for rotation with the engine crankshaft 13. A pump gear 22 is in mesh with the gear 211 and also the gear 22 is in driving relation with the pump 17 by having the pump shaft 23 secured to the gear 22 by means of the key or spline indicated at 24. Therefore, it will be understood that the pump 17 can be removed from the assembly, and the pump shaft 23 would simply slide out of the gear hub 26 which contains the key 24 or of course there could be a spline relationship between the pump shaft 23 and the gear hub 26.

The problem with the provision of an accessory drive or a pump or like powered unit, such as the hydraulic pump 17, when it is desired to incorporate the accessory drive with the prime mover or engine, is to conveniently and securely include the accessory drive and its drive train in the assembly. In solving this problem in the present invention, a mounting plate 27 is disposed adjacent the engine block 28 and is removably secured thereto by means of screws 29. The plate 27 has a ring 31 and a seal 32 centered therewith, and the seal 32 presents the opening for receiving the enlarged end of the engine crankshaft 13, as shown in FIG. 2. In actual assembly, the flywheel 11 and the gear 21 would not be in position when the plate 27 is positioned to have its central opening receive the engine crank-shaft 13, as shown and mentioned. Then the gears 21 and 22 and the flywheel 11 would be positioned and secured in the removable manner, as shown and as mentioned.

It will be further noticed that the plate 27 extends to the side of the engine 10 in a portion designated 33,

and this portion has an opening 34 which receives a cylindrically shaped bearing support member 36 which is suitably secured to the plate 27. A bearing 37 is disposed in the bearing support 36 and the bearing receives the gear hub 26 which can be removed from the assembly by means of the snap ring 38. Finally, a flywheel cover member 39 is secured in the assembly, such as by means of screws 41.

Thus there is provided the removable gears 21, 22 and flywheel 11, and it will be seen and understood that the gear ratio between the engine and the accessory drive or pump 17 can therefore be changed by simply changing gears 21 and 22. Further, it will be understood that the attachment or mounting plate 27 presents the support for the pump 17 by receiving and supporting the bearing support 36 which in turn supports the bearing 37 which in turn removably supports the gear 22. Therefore, the pump 17 can be easily installed and removed from the assembly, simply by virtue of the mounting screws 18 and the splined or keyed drive between the pump shaft 23 and the gear 22, as described.

It will now be seen and understood that the objectives and advantages of this arrangement, as hereinbefore pointed out, are accomplished by the structure described. Particularly it will be noticed that the pump 17 is assembled in a compact manner with the engine 10, and only a minimum of provision or accommodation is required in order to include the accessory drive described. Also, the support or bearings for the rotational parts of the pump 17 do not become subjected to the driving force through the gears 21 and 22, since the bearing support 36 is secured with the mounting plate 27. Further, the gears 21 and 22 can be readily replaced with gears of different sizes for changing the gear ratio between the engine and the pump 17, when desired. Still further, the identical parts can be used with different engines, and special gears or the like need not be made for each engine where the accessory drive is desired. With the arrangement shown and de-' scribed, the full power of the engine 10 can be taken through the accessory drive or pump 17 without any considerable re-design of the engine drive gears or the rearrangement of other parts or accessories relative to the engine 10. Also, the pump 17 is readily available for installation or replacement, as desired.

What is claimed is:

1. In a mounting and drive for a hydraulic pump on an engine of the type including an engine block and a crankshaft, said crankshaft having an extended end and a flywheel mounted thereon, the improvement comprising a plate attached to the engine block and having an opening for receiving the extended end of said crankshaft, said plate being disposed between said block and said flywheel, said plate having one side juxtapositioned to said engine block and having a second side remote from aid engine block, a bearing support on said plate, a bearing in said bearing support, a pump gear having a hub disposed in said bearing, said pump gear being disposed to the side of said plate remote from said engine block, the hydraulic pump is in driving relation with said pump gear, and additional gear means operatively associated between said flywheel and said pump gear for powering said pump by said engine.

2. The mounting and drive for a hydraulic pump as claimed in claim I, wherein said hydraulic pump is slidably drivingly associated with said pump gear for removal from said pump gear.

3. The mounting and drive for a hydraulic pump as claimed in claim 1, including connecting means for removably connecting said flywheel with said crankshaft, and said additional gear means includes a gear removably attached to and co-axial with said flywheel and being in driving relation with said pump gear, and said pump gear being removably mounted relative to said plate, such that said pump gear and said additional gear are removable and replaceable by two other gears of different sizes.

4. The mounting and drive for a hydraulic pump as claimed in claim 3, wherein said hydraulic pump is slidably drivingly associated with said pump gear for removal from said pump gear.

5. The mounting and drive for a hydraulic pump as claimed in claim 1, wherein said hub has an opening for drivingly slidably receiving said pump for powering the latter.

6. The mounting and drive for a hydraulic pump as claimed in claim 5, including connecting means for removably connecting said pump to said plate, and means for removably connecting said pump gear hub to said bearing, for removing said pump and said pump gear. 

1. In a mounting and drive for a hydraulic pump on an engine of the type including an engine block and a crankshaft, said crankshaft having an extended end and a flywheel mounted thereon, the improvement comprising a plate attached to the engine block and having an opening for receiving the extended end of said crankshaft, said plate being disposed between said block and said flywheel, said plate having one side juxtapositioned to said engine block and having a second side remote from said engine block, a bearing support on said plate, a bearing in said bearing support, a pump gear having a hub disposed in said bearing, said pump gear being disposed to the side of said plate remote from said engine block, the hydraulic pump is in driving relation with said pump gear, and additional gear means operatively associated between said flywheel and said pump gear for powering said pump by said engine.
 2. The mounting and drive for a hydraulic pump as claimed in claim 1, wherein said hydraulic pump is slidably drivingly associated with said pump gear for removal from said pump gear.
 3. The mounting and drive for a hydraulic pump as claimed in claim 1, including connecting means for removably connecting said flywheel with said crankshaft, and said additional gear means includes a gear removably attached to and co-axial with said flywheel and being in driving relation with said pump gear, and said pump gear being removably mounted relative to said plate, such that said pump gear and said additional gear are removable and replaceable by two other gears of different sizes.
 4. The mounting and drive for a hydraulic pump as claimed in claim 3, wherein said hydraulic pump is slidably drivingly associated with said pump gear for removal from said pump gear.
 5. The mounting and drive for a hydraulic pump as claimed in claim 1, wherein said hub has an opening for drivingly slidably receiving said pump for powering the latter.
 6. The mounting and drive for a hydraulic pump as claimed in claim 5, including connecting means for removably connecting said pump to said plate, and means for Removably connecting said pump gear hub to said bearing, for removing said pump and said pump gear. 